JPH05205881A - Toning device - Google Patents

Abstract

PURPOSE:To simply and faithfully reproduce illuminating light over a wide area by selecting the chromaticity of two light sources such that when the color temperature is in a specific range the distance from a black body locus on UV coordinates is within a specific area at any color temperature. CONSTITUTION:In a toning device in which color temperatures are variable by dimming of two lamps 8a, 8b of different light colors, the chromaticity of the two light sources is selected such that when the color temperature is in the range of 3000 to 6700K the distance from a black body locus on UV coordinates is within + or -0.005 at any color temperature. Then the chromaticity of the lamps 8a, 8b is within ranges (a), (b), respectively, and light of the mixed color is within a range (c). Therefore a desired color temperature can be achieved through simple constitution by mixing of colors and illumination of good quality is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color-adjusting device capable of varying a color temperature by adjusting the amount of light and the mixing ratio of light sources of two different colors.

[0002]

2. Description of the Related Art Since the color temperature of natural light changes greatly depending on the weather and the time of day, for example, from 1800K at sunrise to 12000K in the clear sky, we who live in this environment can use this light and It is greatly affected by color temperature and recognizes a feeling of comfort caused by natural changes. As a configuration that artificially creates such a change in color temperature,
Conventionally, R (red), G (green), B (blue) as shown in FIG.
This is achieved by using a plurality of color lamps 5a, 5b, 5c such as lamps and appropriately setting and adjusting the light amount and mixing ratio of these. In FIG. 5, 1 is a color temperature selection unit, 2 is a mixing ratio setting unit, 3 is a toning signal generation unit, 4
Reference numerals a, 4b and 4c are dimming lighting devices, 5a, 5b and 5c are color lamps, and 6 is a device.

The color temperature selection unit 1 is composed of, for example, an up / down switch or a fader. When this is operated, the mixing ratios of the lamps 5a, 5b, 5c are mixed so that the color temperature corresponding to the output is obtained. It is read from the ratio setting unit 2. Then, the signal is converted by the toning signal generator 3, and the dimming signals of the plurality of lamps 5a, 5b, 5c are independently output. Upon receiving this dimming signal, the dimming lighting device 4
a, 4b, 4c have different dimming levels, and the lamps 5a, 5b, 5c having different light colors are dimmed and turned on,
The mixed color has the set color temperature. By appropriately operating the color temperature selection unit 1, the color temperature can be freely changed.

For example, when FPL36ER, EG and EB are used as the color lamps 5a, 5b and 5c, when the color temperature is 3000K and the luminous flux is 5500lm, R =
The dimming level is set to 100%, G = 89%, and B = 14%. When the color temperature is 5000K and the luminous flux is 5500lm, R = 64%, G = 100%, B = 45%.
Is set to the dimming level of.

With such a structure, the color temperature can be changed over a wide range, but three types of dimming signals R, G, and B are required, and it is necessary to combine three or more lamps. It has the drawback of complexity. Further, there is a drawback that the calculation of the mixing ratio of each lamp is complicated. Further, there is a drawback that the deviation of the color mixture increases due to the variation of the lamps and the change over time.

In order to solve such a drawback, a method of using two lamps each having a different color temperature and appropriately changing the dimming ratio thereof to obtain a mixed light color can be considered. FIG. 6 shows the configuration of this type of color matching device. The basic configuration of the device is the same as that of FIG. 5, but only two dimming signals are required, and
Only two dimming lighting devices 4a and 4b are required, and lamps 7a and 7b
There is an advantage that only two b's are required and the structure can be easily configured.
However, in a configuration using such two lamps 7a and 7b, when trying to change the color temperature,
The following inconveniences occur. Hereinafter, this inconvenience will be described with reference to specific examples. Now, the white lamps 7a, 7 of FIG.
The following lamp is used as b. Matsushita high color rendering lamp (light bulb color) FLR40S ・ N-
EDL / M Matsushita high color rendering lamp (daylight) FLR40S ・ D-
SDL / M

The color temperature of the lamp is 2700K and the color temperature of the lamp is 6500K. When these lamps are dimmed and the colors are mixed, the locus of the changing color temperature becomes a straight line connecting 2700K and 6500K in FIG. The change range of the color temperature can be arbitrarily set anywhere from 2700K to 6500K, but the blackbody locus (Blackbody)
Locus), a large deviation will occur.
Particularly, the vicinity of 3500K to 5000K is most displaced from the black body locus. This deviation is defined by the distance from the black body locus on the UV coordinate, and the deviation shown in FIG.
It corresponds to n. When this numerical value is read from FIG. 7, the maximum deviation is about −0.007 in the configuration using the lamp. If the deviation becomes large, the color of the white lamp becomes pink or greenish. When the displacement distance is larger than about ± 0.005, the color changes, and when it becomes ± 0.01, the difference becomes considerably noticeable. For this reason, even if it is intended to be mixed with white, it becomes greenish or reddish, which causes discomfort. That is, the conventional example of FIG. 6 has a drawback that the color performance at the time of color mixing is inferior even though the configuration is simplified.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object thereof is to adjust the dimming level of each light source using two different color light sources. Thus, it is possible to faithfully reproduce the illumination light in a wide range over a wide range in a color adjusting device capable of adjusting the illumination light.

[0009]

In the present invention, in order to solve the above-mentioned problems, as shown in FIG. 1, two light sources (lamps 8a, 8b) having different light colors are respectively dimmed. As a result, in the color matching device in which the color temperature is variable, as shown in FIG. 2, the color temperature is at least 3000K-6700.
In the range of K, the distance from the black body locus on the UV coordinate is within ± 0.005 at any color temperature as described above.
The feature is that the chromaticity of one light source is selected.

[0010]

In the present invention, the color temperature is at least 3000K.
In the range of 6700K, the chromaticity of the two light sources is selected so that the distance from the black body locus on the UV coordinate is within ± 0.005 at any color temperature.
In the range of 00K to 6700K, there is an effect that the color mixing performance can be obtained to the extent that the change in color cannot be visually recognized.

[0011]

FIG. 1 is a block diagram of an embodiment of the present invention. The number of lamps and the circuit configuration are the same as those in the conventional example shown in FIG. 5, but the light color of the lamp is a combination of the lamps 8a and 8b having the chromaticity shown by thick frames a and b in FIG. The feature is the point. More specifically, the mixed color of the lamps 8a and 8b has a color temperature of 3000K to 6700K.
The distance from the black body locus on the UV coordinate mentioned above must be ±
The light colors of the lamps 8a and 8b are set so as to be within 0.005.

At this time, the chromaticities of the lamps 8a and 8b may be those having specifications within the ranges shown by the thick frames a and b in FIG. 2, respectively. At this time, the mixed color is in the range shown by the diagonal line c. FIG. 3 shows the chromaticity of the lamps 8a and 8b in the entire chromaticity coordinate, and similarly to FIG.
b need only have chromaticity within the range indicated by a and b,
At that time, the mixed color is in the range indicated by c.

In the embodiment of FIG. 1, discharge lamps are used as the lamps 8a and 8b. For example, the lamps 8a and 8b are set by appropriately setting the dimming ratio of fluorescent lamps such as R, G and B. Or a white lamp (any daylight color, neutral white color, light bulb color, etc.) with a color filter having a chromaticity within the range of the lamps 8a, 8b, or a color lamp resulting in the lamp 8a, It is conceivable that a filter having a range of 8b is attached. When a fluorescent lamp is used, for example, the lamp 8a is a color phosphor R,
It may be composed of a mixture of G, and its light color is as shown in FIG.
The line segment GR and the range of a may intersect with each other. Similarly, the lamp 8b may be composed of a mixture of color phosphors G and B, and the light color thereof is the line segment G- in FIG.
It may be set on the line where the ranges of B and b intersect.

FIG. 4 is a block diagram of the second embodiment of the present invention. In this embodiment, the incandescent lamps 9a and 9b are provided with the color filters 10a and 10b, and as a result, the color lamps corresponding to the above lamps 8a and 8b are configured.
As described above, the two different light sources used in the present invention may be of any type as long as they are capable of dimming.

[0015]

According to the toning device of the present invention, a desired color temperature can be achieved by freely mixing colors in a range of at least 3000K to 6700K with a simple structure, and the quality of the mixed light can be obtained from a black body locus. There is an effect that good quality illumination can be obtained without a large shift. Further, there is an effect that the deviation from the black body locus at the time of color mixing does not significantly increase even if there are variations in lamps or changes with time.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention.

FIG. 2 is a UV coordinate diagram showing characteristics of the first embodiment of the present invention.

FIG. 3 is a chromaticity coordinate diagram showing characteristics of the first embodiment of the present invention.

FIG. 4 is a block diagram of a second embodiment of the present invention.

FIG. 5 is a block diagram of a first conventional example.

FIG. 6 is a block diagram of a second conventional example.

FIG. 7 is a UV coordinate diagram showing characteristics of a second conventional example.

[Explanation of symbols]

 1 Color Temperature Selection Section 2 Mixing Ratio Setting Section 3 Dimming Signal Generation Section 4a Dimming Lighting Device 4b Dimming Lighting Device 6 Fixture 8a First Lamp 8b Second Lamp

Claims (1)

[Claims] 1. A color-tuning device which makes variable a color temperature by respectively dimming two light sources having different light colors, at least in the range of 3000K to 6700K.
A chromaticity of the two light sources is selected such that a distance from a black body locus on UV coordinates is within ± 0.005 at any color temperature.